Office



(No Model.) 2 Sheets-Sheet 1. W. G. PRICE. STREET CAR. BRAKE.

Patented Deo. 8, 1896 Invenlvi@ @Zlatan @PHY/'Cy' I, .J4/enzym;k

(No Model.) l 2 Smets-sheet 2.

W. G. PRICE.

STREET GAR BRAKE. y No. 572.824. Patented Deo..8. 1896 'UNITED STATES PATENT OFFICE.

ITILLIAM G. PRICE, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO MENARD K. BOWEN, OF SAME PLACE.

STREET-'CAR BRAKE.

SPECIFICATION forming part of Letters Patent No. 572,824, dated December 8, 1896.

Application filed June 8, 1896. Serial No. 594,740. (No model.)

To a/ZZ whom t may concern.-

Beit known that I, WILLIAM G. PRICE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have in vented certain Improvements in Street-Car Brakes, of which the following is a specification.

My invention relates to car-brakes, and has for its object to provide certain improvements vin car-brakes, and is illustrated in the accom- B is a friction-disk opposed to the can.

wheel and preferably mounted so as to rotate on the sleeve B2 on the axle C, and B3 is a fixed collar or stop on the axle. Between the xed collar or stop and the disk are placed the two relatively-movable pieces E E,which are provided each with the portion. E2 to surround the axle and sleeve, the two parts being loosely held together by the bolt F and one of them having a projecting part G,which is loosely supported on the car-frame at H.

These two parts constitute a sort of frame, the two forward members of which are interposed between the disk and the stop. The part E2, associated with the part E, is beveled or provided with an inclined face.

J is a bifurcated wedge, two limbs of which surround the sleeve or axle and are beveled, as indicated in Fig. 3, and adapted to be inserted between the two movable and separable pieces E E'. The part J is pivoted at J tothe short bar J3, the two members of its handle portion being adjustably connected by the coupling J 2. The short bar J 3 is pivoted at J 4 to downwardly-projecting lugs and connected at its upper end to the rod J 5, which leads to the brake-handle G. Associated with the disk B are the lugs K K, whence lead the chains L to the evener M, from the two ends of which lead the chains N O, whence suitable connection is made with the several brake-beams or other devices which may be employed for the actual braking of the car.

R R are rods connecting the two brakes. The brake-beam R is rigidly connected with the arm R2, to which the rod R3 is attached at its upper end, this rod being connected by the chains with the clutch.

R4 is a hanger whereby the brake-beam R is suspended from the frame.

R5 is the shoe. p

R6 is the downwardly-depending end of the lever R2 or the downwardly-depending part associated with the brake-beam R. The opposite brake-beam R7 is supported on the hangers R8 and carries the shoe R9. The rod R connects these brake-beams, one below and the other above the shoe. In other words, the leverage on the shoe is different in the two cases, and therefore a much greater pressure is applied to the shoe R5 than to the shoe R9. y

vI do not describe all the features of the device, for some of them form no part of this invention and some have been sufciently described in an application of even date herewith.

It is evident that by operatin g either of the brake-handles the rod J 3 will be rocked on its pivot and the wedge-shaped piece J will therefore be moved back and forth with reference to the two movable parts between which it slides. If it is moved upwardly, referring to the illustration of Fig. 3, it is obvious that it will separate the two parts and thus will force the friction-plate against the wheel, whereupon it will rotate, draw down the brake chains and rods, and set the brakes. The two movable parts are loosely connected and loosely supported on the frame, sothat they may have a motion with reference to each other and a motion with reference to the car. Since the forcing of the wedge- IOO soA

`at the opposite end of the car. have to reduce the pressure on the shoes atv hub of the disk or the sleeve on which it may -be mounted.

It is important to have, and this is one of the objects of my invention, an arrangement whereby a different pressure may be put on the brake associated with the clutch mechanism as compared with the brake not associated directly therewith, and the clutch device operates to a certain extent as a brake, and the braking effect on the two sets of wheels or at the two points where the brakes are applied from the car should be equal. This is necessary to prevent the sliding of the wheels which carry the friction-disk. The braking power of the friction-disk is equal to about forty per cent. of the braking power of the two shoes which are applied to the axle We thus one end of the car forty per cent. otherwise these wheels would slide when the other wheels were being braked to only sixty per cent. of their full capacity.

As previously indicated, I do not wish to be limited to the precise mechanism shown or the particular arrangement of parts. I understand that great variations can be made without departing from the spirit `of my invention, and I wish it distinctly understood that many of such changes I have contemplated and more, doubtless, can be suggested which would still come within the spirit of my improvement.

The portion E2 is provided with a projecting end piece which projects under the part J, said part J resting thereon. rIlhis construction prevents the wear of the sleeve by the part J.

I claim- 1. In a brake device the combination of a wheel with a disk adapted to be frictionally held against the wheel and when rotated to set the brakes, a fixed stop or collar on the axle, two movable parts interposed between the disk and the stop, and a wedge-shaped device adapted to be inserted between the movable parts and to separate them, one of said movable parts provided with a projecting end which extends beneath said wedgeshaped piece and acts as' a bearing for the same.

2. In a brake device the combination of a wheel with a disk adapted to be frictionally held against the wheel and when rotated to set the brakes, a iixed stop or collar on the axle, two movable parts interposed between the disk and the stop, and a wedge-shaped piece adapted to be inserted between the movable parts and to separate them, the two movable parts loosely connected and loosely supported on the frame of the car.

3. In a brake device the combination of a wheel with a disk adapted to be frictionally held against the wheel and when rotated to set the brakes, a xed stop or collar on the axle,` two movable parts interposed between the disk and the stop, and a wedge-shaped piece adapted to be inserted between the movable parts and to separate them, the wedge connected with one of the movable parts.

4. In a brake device the combination of a wheel with a disk adapted to be frictionally held against the wheel and when rotated to set the brakes, a fixed stop or collar on the axle, two movable parts interposed between the disk and the stop, and a wedge-shaped piece adapted to be inserted between the movable parts and to separate them, the wedge connected with one of the movable parts, said movable part supported in a comparatively fixed relation to the axle.

5. In a brake device the combination of a car-wheel with a frictiondisk adapted when rotated to set the brakes, a stop or collar on the axle, two movable parts interposed between the collar and the disk, one of them surrounding and thus secured to the axle, a wedge adapted to be forced between the two parts to set the friction device, said wedge consisting of two projecting arms, one on each side of the axle, substantially as described.

6. In a brake device the combination of a car-wheel with a friction-disk adapted when rotated to set the brakes, a stop or collar on the axle, two movable parts interposed between the collar and the disk, one of them surrounding and thus secured to the axle, a wedge adapted -to be forced between the two parts to set the friction device, said wedge connected to the brake-handle through one of the movable parts,

7. In a brake device for street-cars a friction device on one axle opposed to a wheel, which winds up a chain or rope so as to ap- ICO ply the brake-shoes to the car-wheels, means v Witnesses:

BERTHA C. SIMS, LILLEY W. J oHNsToNE.

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